Toothbrush



Dec. 15 1925' 1,565,750 S, NATHANSON @@@THEUSH Filed Jun@ 20 i934Patented Dec. 15, 1925.

SAMUELINATHANSON, 0F ROXBURY, MASSACHUSETTS.

TOOTHBRUSH.

Application filed .Tune 20, 1924. Serial No. 721,355.

T o all whom t may concern:

Be it known that I, SAMUEL NATHANsoN, a citizen of the United States,residing at 48 Stanwood Street, Roxbury, in the county of Suffolk andState of Massachusetts, have invented certain new and usefulImprovements in Toothbrushes, of which the following is a specification.

The present invention relates to certain new and useful improvements inVtooth brushes.r

The objection to the ordinary tooth brush is due to the fact that it isvery diilicult if not impossible to thoroughly cleanse the 1nside of theteeth.

The object of my invention is to provide a tooth brush that will cleansethe outside and inside of the teeth by the same operation.

Another object of my invention is to provide a tooth brush that by avery simple movement 'of the brush, it is adapted to present the brushesfor operations either on the upper or lower teeth.

Another object of my invention 1s to provide means to keep the brushesin an extended position when not in use, means to enable the brushes tomove in a straight horizontal line toward each other kwhen the brushesare in operation.

The invention will be hereinafter considered in detail and specificallyclaimed. Reference will now be had to the drawing forming a part of thisapplication, wherein there is illustrated a preferred embodiment of myinvention, but it is understood that the structural elements thereof canbe varied or changed as to the shape, size or form without departingfrom the spirit of the invention.

In the drawings Fig 1 is a plan View of the tooth brush.

Fig.V 2 is a side View of the brush.

Fig. 3 is an end view of the brush.

10 re resents a handle made of a flat piece o metal bent into a U-shapedform.

Near the ends of the two prongs of this U-V shaped piece of metal thereare two rectangular slots 11. The ends of the prongs are provided withpivots, 13 and 14, at which pivots the two brushes, 23 and 24, arepivotally attached. The brush 23 presents a convex surface and the brush24 presents a concave surface to the teeth. The tooth brush is used sothat brush 23 is applied on the outside and brush 24 on the inside ofthe teeth. The brushes are mounted so that theyare somewhat more distantfrom each other at the top than they are at the bottom. This is done forthe reason that teeth are somewhat more wider near the gums than at theend, with the result that the brushing and cleansing of the teeth isdone evenly all over the teeth. There are two flat arcuated pieces ofmetal, 15 and 16, forming a spring. One end of these two pieces of metalis solidly connected to the U-shaped prongs at 17, 18, 19 and 20. Theends of the arcuated pieces of metal 15 and 16 are provided with twoextensions 25 and 26 which slidably fit into the slots 11 and have flatsurfaces 27 and 28 at their ends. These two surfaces 27 and 28 are incontact with the brushes 23 and 24 only when the brushes are in use. Theflat surfaces 27 and 28 press against the Hat surfaces of the brushes at29 and 30 when the brushes are in use. This causes the brushes to remainfirm and in place when in use.

Then it is desired to use the brushes on the upper teeth the spring isallowed to push the handles 10 apart causing the extensions 25 and 26 torecede, thereby allowing the brushes to rotate about their pivot atangle of 180 degrees. This places the brushes in position to be used onthe upper teeth. A fiat piece of metal 21 is bent into a rectangularform and is solidly connected to one prong at 22. The other end of thisrectangular form is left free. By means of this arrangement the prongsare forced to move toward each other in a straight horizontal direction.

In the normal position the brushes are kept apart due to the springspressing against each other. When it is desired to operate the brushesto cleanse the teeth the operator presses the two prongs togetherbringing the two brushes in contact with the inner and outer surface ofthe teeth.

The end of the U-shaped piece of metal 10 may be used as a tonguescraper.

Having described my invention whatI claim is 1. A tooth brush comprisinga U-shaped resilient member, brushes pivotally mounted at the ends ofsaid member, said ends having slots therein, and springs connected tosaid U-shaped member and having extensions movable in said slots for thepurpose described.

2. A tooth brush comprising a U-shaped resilient member, a brush mountedon each leg` thereof, and a spring connected at both ends thereof toeach ieg of said U-shaped member, the said springs abutting euch l0other at their intermediate portions for i'orcing said brushes apart.

SAMUEL NATHANSON.

